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Local Group

(Encyclopedia)Local Group, in astronomy, loose cluster of at least 40 nearby galaxies, including our own Milky Way galaxy, the Andromeda Galaxy, and the Magellanic Clouds. The Local Group is spread over an ellipsoi...

prosthetic group

(Encyclopedia)prosthetic group, non-amino acid portions of certain protein molecules. The key part of the prosthetic group may be either organic (such as a vitamin) or inorganic (such as a metal) and is usually req...

Furneaux Group

(Encyclopedia)Furneaux Group fûrˈnō [key], about 25 islands, c.900 sq mi (2,330 sq km), Tasmania, SE Australia, in Bass Strait between Tasmania and the Australian mainland. The largest is Flinders Island, and th...

ammonium group

(Encyclopedia)ammonium group, in chemistry, a positively charged nitrogen atom joined by single bonds to four other atoms or groups. The simplest ammonium group, NH4+, is formed by protonation of ammonia, NH3, e.g....

therapy group

(Encyclopedia)therapy group: see group psychotherapy. ...

encounter group

(Encyclopedia)encounter group: see group psychotherapy. ...

group dynamics

(Encyclopedia)group dynamics: see group psychotherapy. ...

pressure group

(Encyclopedia)pressure group, body, organized or unorganized, that actively seeks to promote its particular interests within a society by exerting pressure on public officials and agencies. Pressure groups direct t...

amino group

(Encyclopedia)amino group, in chemistry, functional group that consists of a nitrogen atom attached by single bonds to hydrogen atoms, alkyl groups, aryl groups, or a combination of these three. An organic compound...

Group Theatre

(Encyclopedia)Group Theatre, organization formed in New York City in 1931 by Harold Clurman, Cheryl Crawford, and Lee Strasberg. Its founders, who had worked earlier with the Provincetown Players, wished to revive ...